main/iso-codes: upgrade to 3.56 and split out -dev

We split the -dev package so we dont pull in pkgconfig as dependency
main/gimp: use iso-codes-dev in makedepends and remove unused config options
main/libsexy: update makedepends
main/libxklavier: clean up makedepends
main/xfce4: do not pull in tango icon theme
testing/lightdm: use Xsession from xinit as session wrapper
testing/lightdm: add accounssservice to depends
main/xfce4-setting: use faenza icons and greybird as the defaults
main/musl: fix alignas on x86

This fixes build of xulrunner and qt5.

Mentioned upstream.
http://www.openwall.com/lists/musl/2014/09/11/1
main/curl: upgrade to 7.38.0
main/xmlrpc-c: upgrade to 1.25.29
testing/py-scipy: expand depends_dev

assume python-dev, openblas-dev, etc. will be needed if compiling against it
main/freeswitch: remove unused patch for Lua

we use system liblua so we dont need patch the lua sources in freeswitch
source tree.
main/libspf2: upgrade to 1.2.10 and fix build with musl
main/qemu: upgrade to 2.1.1
main/wine: upgrade to 1.7.26
testing/lightdm: fix problem with missing dirs
testing/lightdm: fix typo in init.d script
main/xf86-video-modesetting: add patch from upstream
main/xf86-video-modesetting: add patch from fedora